An approach is presented to design fuselage frames for minimum weight, minimum cost, or a combination of the two. The approach combines structural requirements and manufacturing constraints into an optimization scheme that alters the geometry of the individual frame components until the objective Function is minimized. In addition to the lowest weight and cost points, a near-optimal Pareto set of designs is found, out of which the design that minimizes both cost and weight is determined through a penalty function approach. Four different fabrication processes are considered: conventional sheet metal, high speed machined metal, hand laid-up composite, and resin transfer molded composite. For lightly loaded frames, an automated resin transfer molding process gives the lowest cost and weight designs. For highly loaded frames, high speed machining gives the lowest cost design but automated resin transfer molding gives the lowest weight design. The effects of fabrication process and some of the design and manufacturing constraints on cost and weight are examined.
Minimum cost and weight design of fuselage frames. Part B: cost considerations, optimization, and results
Die Konstruktion von Rahmen für Flugzeugrümpfe mit minimalem Gewicht und minimalen Kosten, Teil B: Kostenüberlegungen, Optimierung und Ergebnisse
Composites, Part A: Applied Science and Manufacturing ; 30A , 7 ; 895-904
1999
10 Seiten, 6 Bilder, 1 Tabelle, 6 Quellen
Article (Journal)
English
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